| 辽宁省主要地区农田生态系统氮负荷的研究 |
| The research of nitrogen load on farmland ecosystem of liaoning province |
| 投稿时间：2013-01-24 修订日期：2013-03-10 |
| DOI： |
| 中文关键词:氮负荷 农田生态系统 辽宁省 氮估算 |
| 英文关键词:nitrogen load farmland ecosystem nitrogen estimation liaoning province |
| 基金项目:辽宁省自然基金(201104526); 沈阳市科学计划项目(121807,F12-178-9-00); 辽宁大学 211基金。 |
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| 中文摘要: |
| 利用辽宁省统计年鉴以及文献相关数据,通过农田养分收支平衡的计算,使用GIS工具,探讨辽宁省各地区农田生态系统的氮平衡变化。结果表明,辽宁省2007-2009年的平均总氮输入量是1.40E+09kg/a,平均总氮输出量是9.28E+08kg/a,平均总氮负荷是4.68E+08kg/a;其中,由使用化肥所产生的氮输入占总氮输入量的56.75%,有机肥氮占总氮输入量的18.73%。平均单位面积的氮输入量为358.94kg/(hm2•a),平均单位面积的氮输出量为240.37kg/(hm2•a),平均氮负荷为118.57kg/(hm2•a)。通过对辽宁省14个地区农田生态系统的氮负荷研究,可以预测出不同地区的农田氮负荷对辽河流域水环境以及地下水的潜在威胁,对农田非点源污染的管理与预防具有重大意义。 |
| 英文摘要: |
| By using the statistical yearbook and literature data of Liaoning Province and GIS technology，this paper discusses the nitrogen balance changes of farmland ecosystem through the calculation of farmland nutrient balance of input and output. In Liaoning Province，in 2007 to 2009，the result shows as follow: the total nitrogen input to the region was 1 .40 E+09 kg/a.，and the Total nitrogen output from the region was 9.28E+08 kg/a，resulting in a nitrogen load of 4. 68E+08kg/a. Among these ,56.75% of the total nitrogen input come from the use of chemical fertilizers，18. 73 % of the total nitrogen input come from the use of organic fertilizer nitrogen. And the average per unit area nitrogen input is 358.94 kg/(hm2•a).The average nitrogen output per unit area is 240. 37 kg/(hm2•a)，The average nitrogen load is 118. 57kg/(hm2•a).Through the study of the farmland ecosystem nitrogen load of 14 districts in Liaoning Province，We can predict that the farmland nitrogen load in different district make potential threats to water environment and groundwater in Liaohe river basin. That has significant meaning for the management and prevention of farmland non-point source pollution. |
| 梁雷,张建莉,王峰源.2013.辽宁省主要地区农田生态系统氮负荷的研究[J].水生态学杂志,34(2):62-68. |
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